The Sefer Me'or Einayim:
Rav Levi Yitzchok of Berditchov zy"a writes in his haskamah to Sefer Me'or Einayim: "This sefer is divrei Elokim chaim to arouse the spirit of people to ascend upwards, to ignite their hearts to serve Hashem."
Rav Yitzchok Isaac of Kamarna zy"a writes in his Sefer Nesiv Mitzvosecha (Shvil Hatorah, Siman 32): "Sefer Me'or Einayim should not move out of your eyesight. All its words are lofty and holy."
Rav Yitzchok of Skver zy"a said: "Just like in earlier times learning the Zohar Hakadosh worked to purify the soul, so too in our times Sefer Me'or Einayim purifies the soul."
May the zechus of the tzadik be a source of protection for all of Klal Yisroel.